There is a possibility that France alone would do, being so damn close and well... But not sure if they would win.
Yes big army , big country, right next door, but politicaly and socially and above all financialy messed up six ways from sunday
So for this to happen a POD or PODS are required which give France a long history of stable government, no post war financial instability and much less division between left and right in the political field.
Having said that you are right given the right orders from Paris the French army could have marched east as they did in 1923 and won .It would have discredited Hitler and led the way to a negotiated settlement which was already being mooted in diplomatic circles.
Alas I think that even this will not stop WW2 which is a culmination of a host of pressures .Take away the nazi's and you still have those pressures ,expressed in different ways but still leading to war.